Home / 260,120.09-390,211.37-91,605.56

Finding the Fourth Proportional to 260,120.09, 390,211.37 and 91,605.56

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Solution

The fourth proportional to 260,120.09, 390,211.37 and 91,605.56 is: 137,419.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,120.09 : 390,211.37 = 91,605.56 : x
  2. Step 2: Convert to fraction form
    260,120.09/390,211.37 = 91,605.56/x
  3. Step 3: Cross multiply
    260,120.09x = 390,211.37 × 91,605.56
  4. Step 4: Simplify right side
    260,120.09x = 35,745,530,609.19
  5. Step 5: Solve for x
    x = 35,745,530,609.19/260,120.09
  6. Step 6: Final answer
    x = 137,419.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.